Explosive bullet



NW, 2 1944. W, MOORE ET AL 2,361,955

Filed June 27, 1941 Willey 'T MUDTE Richard N-NE'15E1T1 Patented Nov. 7,1944 UNITED STATES PATENT OFFICE EXPLOSIVE BULLET Wiley T. Moore, UnitedStates Army, Laverne, kla., and Richard N. Nelson, Black River Falls,

Wis.

Application June 2'7, 1941, Serial No. 400,040

(Granted under the act of March 3, 1883, as amended April 30, 1928; 3700. G. 757) 1 Claim.

plosive or incendiary bullet which may be large- 1y constructed fromstandard components.

The specific nature of the invention as well as other objects andadvantages thereof will clearly appear from a description of a preferredmbodiment as shown in the accompanying drawing in which: 1

Figure 1 is a longitudinal section of a part of a projectile embodyingone form of the invention.

Figure 2 is a longitudinal section showing another embodiment of theinvention.

Figure 3 is a longitudinal section of another embodiment of theinvention.

Referring to the drawing by characters of reference, Figure 1 shows aportion of an explosive projectile having a jacket I of gilding metal orthe like enclosing a hollow core 2 containin a main charge 3. Theforward end of the hollow core is bored to accommodate a standard primercapsule 4 having an oversize anvil 5 and containing a priming charge 6.The anvil fits in the bore with sufficient tightness to support itagainst the ordinary shocks of handling. A shoulder l is providedengaging the rear edge of the primer capsule 4 to support it againstsetback.

Upon impact of the projectile against any relatively solid object theforward motion of the jacket and core will be retarded. The anvil willtend to continue forward and is made sufficiently overweight that itwill bev abl to overcome its frictional engagement with the bore inwhich it is seated. The primer charge will thus be crushed between thejacket nose and the anvil and the resulting explosion will flash throughthe conventional passages 8 in the anvil to initiate the main charge.

In the modification of the invention shown in Figur 2 the nose of thejacket I is formed with a central rearwardly directed firing pin 9.

hollow core is bored to provide a shoulder Ill to support the anvil 5and primer cup 4 of a standard primer against the forces of inertia. Thebore is of 'such a diameter that a standard primer will be retainedtherein against all ordinary shocks and of such a depth that the primerextends slightly beyond the front face of the core. The conventionalflash passages 8 in the anvil and a flash passage II in the core placethe priming charge in communication with the main charge. The core isassembled in the jacket and the core tends to continue at the same rateof speed. The jacket will be sufiiciently deformed to permit the core tomove forward relative to the jacket and cause the firing pin to piercethe primer capsule and inflame the charge therein for initiation of themain charge.

In the modification of the invention shown in Figure 3 a primer eitherstandard or with the oversize anvil is supported as in Figure 2 with theexception that it is mounted far enough forward that the tip of theanvil is in advance of the face of the core. No firing pin is providedon the jacket nose and upon impact the core will drive forward to crushthe primer com pound between the anvil and the jacket nose.

It will be noted that the manufacture and 3.8 sembly of theseprojectiles will be extremely simple. The jackets of gilding metal orthe like may be drawn in the conventional manner and the cores which areconveniently formed of steel may be shaped in automatic screw machinery.The primers used are largely or wholly of standard manufacture.

We claim:

A bullet comprising a jacket, a hollow metal core nested in the jacketand containing an explosive charge, said core being provided with a boreat its forward end in communication with said explosive charge, a primercup in said bore and containing a primer charge at its forward end, ananvil tightly fitted in said cup and constituting an inertial elementadapted to move forward to fire the primer charge upon impact of thebullet, and means in the bore to prevent rearward movement of the primercup upon set back.

WILEY T. MOORE. RICHARD N. NELSON.

